[Linux-cluster] CCSD ipv6 bind failures

[Ashish G]

hi Experts,
               I has few question on ccsd:
1. what is the purpose of ccsd listening on ipv4 and ipv6 addresses as
follows in my 2 node HA setup? We do not use IPv6 in our setup.

netstat -antp |grep ccsd

tcp        0      0 0.0.0.0:50008               0.0.0.0:*
LISTEN      18170/ccsd

*tcp        0      0 ::1:50006
:::*                        LISTEN      18170/ccsd*


**

*CCSD is invoked without any arguments:
*

*root     18170     1  0 14:12 ?        00:00:00 /sbin/ccsd*

2. Is it not sufficient to use IPv4 only by CCSD?

3. Sometimes on node reboot we see messages as follows:

"Unable to bind to backend ipv6 socket, but inet_ntop returned NULL
pointer: Address already in use"
Does anyone know when is this problem seen?

4. If I invoke CCSD with "-4" option, will I get rid of the above message?
since ipv6 code path will not hit.

*root       461     1  0 14:28 ?        00:00:00 /sbin/ccsd -4*

netstat -antp  |grep ccsd

*tcp        0      0 127.0.0.1:50006             0.0.0.0:*
LISTEN      461/ccsd*

tcp        0      0 0.0.0.0:50008               0.0.0.0:*
LISTEN      461/ccsd


Regards,
Ashish
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